Ranking of Washington Counties By Total Population from Census 2020
Updated on February 7, 2023.
According to the data from the US 2020 Census, the most populated Washington county as at April 2020 was King County (2.27M), followed by Pierce County (921.13K), and Snohomish County (827.96K).
The chart below shows the top 10 most populated counties, and the table below shows the ranking of all the counties in the state of Washington.
You can also see the ranking of counties by population for other states as well as for the whole United States.
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Related Topics: Washington Census 2020 Topic List.
Data Source: US Census Bureau, 2020 Census.
Ranking of Washington Counties By Total Population from Census 2020
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| Rank | County | Population |
|---|---|---|
| 1 | King County | 2269675 |
| 2 | Pierce County | 921130 |
| 3 | Snohomish County | 827957 |
| 4 | Spokane County | 539339 |
| 5 | Clark County | 503311 |
| 6 | Thurston County | 294793 |
| 7 | Kitsap County | 275611 |
| 8 | Yakima County | 256728 |
| 9 | Whatcom County | 226847 |
| 10 | Benton County | 206873 |
| 11 | Skagit County | 129523 |
| 12 | Cowlitz County | 110730 |
| 13 | Grant County | 99123 |
| 14 | Franklin County | 96749 |
| 15 | Island County | 86857 |
| 16 | Lewis County | 82149 |
| 17 | Chelan County | 79074 |
| 18 | Clallam County | 77155 |
| 19 | Grays Harbor County | 75636 |
| 20 | Mason County | 65726 |
| 21 | Walla Walla County | 62584 |
| 22 | Whitman County | 47973 |
| 23 | Stevens County | 46445 |
| 24 | Kittitas County | 44337 |
| 25 | Douglas County | 42938 |
| 26 | Okanogan County | 42104 |
| 27 | Jefferson County | 32977 |
| 28 | Pacific County | 23365 |
| 29 | Klickitat County | 22735 |
| 30 | Asotin County | 22285 |
| 31 | Adams County | 20613 |
| 32 | San Juan County | 17788 |
| 33 | Pend Oreille County | 13401 |
| 34 | Skamania County | 12036 |
| 35 | Lincoln County | 10876 |
| 36 | Ferry County | 7178 |
| 37 | Wahkiakum County | 4422 |
| 38 | Columbia County | 3952 |
| 39 | Garfield County | 2286 |